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RP Motorsport driver Vitor Baptista claimed the championship title by five points (on dropped scores), winning six races during the 2015 campaign, including four consecutive victories during the second half of the season. The runner-up position in the championship went to Konstantin Tereshchenko for Campos Racing, who like Baptista, took six victories during the season. The championship top-three was completed by Yu Kanamaru, who took a single race victory at Silverstone for Emilio de Villota's team. Other drivers to win races were DAV Racing's Alessio Rovera (Jerez) and Leonardo Pulcini (Red Bull Ring), while Baptista's teammate Damiano Fioravanti won at Monza. These seven wins for RP Motorsport enabled them to win the teams' championship by ten points ahead of Campos Racing.
In the Spanish Formula Three sub-classification, Tereshchenko and Campos Racing snared their respective titles. Over the three meetings at Jerez, Estoril and Barcelona, Tereshchenko won four of the six races to best Baptista by thirty-seven points, who only won once, at Estoril. Kanamaru finished a further nine points in arrears in third place. With Tereshchenko's four wins, Campos Racing finished nine points clear of RP Motorsport in the teams' championship.
Edi Haxhiu was scheduled to compete for Corbetta Competizioni, but did not appear in any rounds.
Race calendar and results
An eight-round provisional calendar was revealed on 5 November 2014. On 2 December 2014, it was confirmed, that the third round would take place at Estoril. All rounds, except for Jerez, supported the International GT Open series, with rounds denoted with a blue background being part of the Spanish Formula Three Championship.
Hensby, Paul (1 September 2015). "ALESSIO ROVERA RETURNS TO DAV RACING AT SPA". The Checkered Flag. Retrieved 4 September 2015. In other driver news, RP Motorsport will field Thai driver Kantadhee Kusiri this weekend at Spa-Francorchamps for his European racing debut.
"Baptista firma con Campos per il 2015" [Baptista signs with Campos for 2015]. ItaliaRacing.net (in Italian). Inpagina. 26 December 2014. Retrieved 27 December 2014.
"Raghunathan con West Tec a Monza" [Raghunathan with West Tec at Monza]. ItaliaRacing.net (in Italian). Inpagina. 22 September 2015. Retrieved 27 September 2015.
Caruccio, Antonio (26 September 2015). "Ling con DAV a Monza" [Ling with DAV at Monza]. ItaliaRacing.net (in Italian). Inpagina. Retrieved 27 September 2015.
"Il calendario 2015, da Jerez a Montmelò" [The 2015 calendar, from Jerez to Montmelò]. ItaliaRacing.net (in Italian). Inpagina. 5 November 2014. Retrieved 5 November 2014.